US3182933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft control systems
Assignee: Rolls Royce PLC
•
Filing: 1961-07-26
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Granted: 1965-05-11
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Expires: 1981-07-26
Abstract
No abstract record available.
Inventors
- 👤 Smith Alfred John
- 👤 Metcalf Eric
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:29
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
AN AUTOMATIC CONTROL SYSTEM FOR AN AIRCRAFT OF THE TYPE HAVING MEANS TO EXERT A VERTICAL LIFT THRUST EXCEEDING THE WEIGHT OF THE AIRCRAFT INDEPENDENTLY OF AERODYNAMIC LIFT DUE TO FORWARD FLIGHT WHICH COMPRISES MEANS OPERABLE TO SELECT THE VERTICAL ACCELERATION WHICH IT IS DESIRED THAT THE AIRCRAFT SHALL HAVE AND ADAPTED TO PRODUCE AN ELECTRIC SIGNAL WHICH IS A MEASURE OF THE DESIRED ACCELERATION, MEANS RESPONSIVE TO THE VERTICAL ACCELERATION OF THE AIRCRAFT AND ADAPTED TO PRODUCE AN ELECTRIC SIGNAL WHICH IS A MEASURE OF THE QUANTITY SENSED, ADDER MEANS ADAPTED TO RECEIVE THE SIGNALS FROM THE SELECTOR MEANS AND FROM THE MEANS RESPONSIVE TO THE QUANTITY SENSED AND ADAPTED TO PRODUCE AN OUTPUT ELECTRIC SIGNAL WHICH IS A MEASURE OF THE DIFFERENCE BETWEEN THE TWO SIGNALS, MEANS TO AMPLIFY SAID OUTPUT SIGNAL, ACTUATOR MEANS OPERATED BY THE AMPLIFIED SIGNAL, AND VERTICALTHRUST-VARYING MEANS CONNECTED TO THE ACTUATOR MEANS TO BE OPERATED THEREBY TO VARY THE VERTICAL LIFT THRUST OF THE
Claim 2
Dependent Claim
161 words
AN AUTOMATIC CONTROL SYSTEM FOR AN AIRCRAFT OF THE TYPE HAVING MEANS TO EXERT A VERTICAL LIFT THRUST EXCEEDING THE WEIGHT OF THE AIRCRAFT INDEPENDENTLY OF AERODYNAMIC LIFT DUE TO FORWARD FLIGHT WHICH COMPRISES MEANS OPERABLE TO SELECT THE VERTICAL ACCELERATION WHICH IT IS DESIRED THAT THE AIRCRAFT SHALL HAVE AND ADAPTED TO PRODUCE AN ELECTRIC SIGNAL WHICH IS A MEASURE OF THE DESIRED ACCELERATION, MEANS RESPONSIVE TO THE VERTICAL ACCELERATION OF THE AIRCRAFT AND ADAPTED TO PRODUCE AN ELECTRIC SIGNAL WHICH IS A MEASURE OF THE QUANTITY SENSED, ADDER MEANS ADAPTED TO RECEIVE THE SIGNALS FROM THE SELECTOR MEANS AND FROM THE MEANS RESPONSIVE TO THE QUANTITY SENSED AND ADAPTED TO PRODUCE AN OUTPUT ELECTRIC SIGNAL WHICH IS A MEASURE OF THE DIFFERENCE BETWEEN THE TWO SIGNALS, MEANS TO AMPLIFY SAID OUTPUT SIGNAL, ACTUATOR MEANS OPERATED BY THE AMPLIFIED SIGNAL, AND VERTICALTHRUST-VARYING MEANS CONNECTED TO THE ACTUATOR MEANS TO BE OPERATED THEREBY TO VARY THE VERTICAL LIFT THRUST OF THE
References Cited (Backward Citations)
US2650046A
Cited
US2830291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |